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Old 3/16/10, 3:27 PM
Gary Reecher Gary Reecher is offline
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Join Date: Aug 2004
Posts: 273
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Default Re: ducting material

We encounter a few old Coleman 1950's heating only systems that have 3-1/2 inch branch pipes that need to be removed and upgraded to 6 inch to get the required airflow for air conditioning.
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